Pith Number

pith:4BGKBLDQ

pith:2003:4BGKBLDQ5DPVC62DMLRD42ABJZ

not attested not anchored not stored refs pending

The isolated interacting galaxy pair NGC 5426/27 (Arp 271)

A. Bernal, D. Dultzin-Hacyan, E. Laurikainen, E. Le Coarer, H. Salo, I. Cruz-Gonzalez, I. Fuentes-Carrera, M. Rosado, P. Ambrocio-Cruz, P. Amram

arxiv:astro-ph/0312535 v1 · 2003-12-19 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4BGKBLDQ5DPVC62DMLRD42ABJZ}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-04T16:38:02.850756Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e04ca0ac70e8df517b4362e23e68014e7ff2ec5da195acc25e691d6ccd00feb0

Aliases

arxiv: astro-ph/0312535 · arxiv_version: astro-ph/0312535v1 · doi: 10.48550/arxiv.astro-ph/0312535 · pith_short_12: 4BGKBLDQ5DPV · pith_short_16: 4BGKBLDQ5DPVC62D · pith_short_8: 4BGKBLDQ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/4BGKBLDQ5DPVC62DMLRD42ABJZ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: e04ca0ac70e8df517b4362e23e68014e7ff2ec5da195acc25e691d6ccd00feb0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c3e6a757f4295cf4c75717deaaf705a5393d8f469b514f05ad8df776dcd43b6",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-12-19T17:16:46Z",
    "title_canon_sha256": "97fadf4f4c7a42c6d228a12ccbb81b08e1911193556118a3b7ee1beb703ce274"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0312535",
    "kind": "arxiv",
    "version": 1
  }
}